Shim.



SHIM.

APPLICATION FILED MAY 15H8- ,2975 Pat/@1111111 Mar. 18,1919.

DWIN B. CANTRELL AND GEORGE E. MILLER, OF SAN FRANCISCO, CALIFORNIA.

SHIM.

and (lnonor. E. Minnen, citizens ot the lhiited States residing at thecity and county of San Francisco and State of California, have inventednew and useful Improvementsl in Shims. of which the following' isaspecification.

rI`his invention relates to a shim, and particularly to a shim which isadapted to be inserted between the hub of a. wheel and the axle wherethe wheel is rigidly secured on the axle, the object of the. invention'being to provide a cone-shaped split shim adapted to be placed on the.tapered end ci a driving; axle and to provide said shim with means forsecuring it against endwise movement when the wheel vis applied. willhereinafter appear.

The invention consists of the parts and the combination7 constructionand arrangement of parts as hereinafter more. 'fully described andclaimed7 having reference to the accompanyingl drawings, in whiclr-Figure l is a side elevation in section ot adriving axle, wheel hub andbrake drum showing the application ot the invention.

Fig. 2 is a. perspective. view of the .shim proper.

Referring to the drawings in detail, A indieatesthe tapered end oi adriving axle7 2 the hub ot a wheel, l the spokes secured therein, 4t thehub cap, 5 the hub key and (i the castle nnt by which the hub is securedWhen placed on the axle.. Secured to the inner side of the wheel hule bymeans ot bolts 'l' is a brake, drum S, and `mounted intel rior of thebrake drum is a. hub brake shoe 9 which 1s carriedby theend lange l0 ofthe axle housing. Projecting into the brake drum 8 from the tace of theend flange of the axle housing are severalv nuts, such Aas shown at 11.One of these nuts secures the radius rod bolt, another one the hubbrake, cam shaft lever7 etc., and also projecting from the face ot' theliange l0 is the axle housing cap l2.

In actual practice, when it is desired to place the wheel proper on theaxle 1t is only necessary to slip 1t over the tapered end A on the axle,then to insert the key 5 and finally to draw the wheel tight upon theshaft by turning;v or tightening; up the.

castle nut 6. Constant removal and replacing of the wheel causes more,or less wear on the tapered end or' the shaft and also more Furtherobjects Specification of Letters Patent. {maligni-Qd iwal- 15;, gjig.Application led May .7, 1918, Serial No. 233,144.

or less expansion of the wheel hub. 1t can theretore. be. seen that thewheel has a tendency to be crowded 1nwardl \v more and more as weartakes place. This finally proinner t'ace ot' thel brake drum to crowd upaga-inst the axle housingcap, thus producing unnecessary friction anddamage, to the several nuts described. In fact, it often happens thatthe wheel locks itself entirely and it becomes necessary to cnt away thenuts to permit the Wheel to turn.

These detects are overcome in the present instance by providing` acone-shaped shim, such as shown at lt, in Fig'. This shim is splitlongitudinally, as at l5, and is providedwith an annular flange 16 atone end to loch' it against endwise movement. This shim when placed uponthe tapered end oft the axle takes up any wear or expansion that mayhave taken place and therefore always retains the wheel in its properplace upon the axle. lt furthermore becomes possible to tighten up thenut.` (i as much as desired, as there is no danger o'tl crowding thewheel and the brake drinn carried thereby' endwise, either against the.axle housing' cap l2 or the other parts previously referred to. Thesplit l5 'formed in the shim permits the insertion ot the key 5 and theend flange lo prevents endwise movement on the shine such as theexperience and manufacturer may dictate. i

Having' thus described our invention, what we desire to claim andsecurmby Letters Patent is:

1. A conc-shaped split shim and an inw wardly turned annular flange onone end of the shim.

2. The combination with an axle leaving a tapered end, a keyway formedin said end and a whecl hub adapted 'to be received on l said axle andsecured against turning there- 0n by the insertion of a key, of a, shimadapted to 'be interposed between the tapered axle and the wheel hub,said shim being s lit to permit insertion of the `key and a,

vange on the VShun adapted to secure it against endwise movement on thetapered axle lWhen the hub is driven into piace.

' g memee n testimony whereof We have hereunto seeehr hands inthepresence 0i* two subl0 seribing Witnesses.

EDWIN B. CANTRELL. GEORGE E. MILLER.

Witnesses:

JOHN H. HERRING, W. W. HEALEY.

